US4660414A - Petroleum stream monitoring means and method - Google Patents

Petroleum stream monitoring means and method Download PDF

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Publication number
US4660414A
US4660414A US06/775,073 US77507385A US4660414A US 4660414 A US4660414 A US 4660414A US 77507385 A US77507385 A US 77507385A US 4660414 A US4660414 A US 4660414A
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United States
Prior art keywords
stream
signal
flow rate
gas
liquid
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Expired - Lifetime
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US06/775,073
Inventor
Gregory J. Hatton
David A. Helms
Thomas M. Williams
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Texaco Inc
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Texaco Inc
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Priority to US06/775,073 priority Critical patent/US4660414A/en
Assigned to TEXACO INC. reassignment TEXACO INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HATTON, GREGORY J., HELMS, DAVID A., WILLIAMS, THOMAS M.
Priority to DE19863622669 priority patent/DE3622669A1/en
Priority to GB8619215A priority patent/GB2180352B/en
Priority to CA000517440A priority patent/CA1296927C/en
Priority to NO863555A priority patent/NO172611C/en
Priority to DK435986A priority patent/DK435986A/en
Application granted granted Critical
Publication of US4660414A publication Critical patent/US4660414A/en
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Expired - Lifetime legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/08Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/74Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26Oils; viscous liquids; paints; inks
    • G01N33/28Oils, i.e. hydrocarbon liquids
    • G01N33/2823Oils, i.e. hydrocarbon liquids raw oil, drilling fluid or polyphasic mixtures

Abstract

Apparatus and method for monitoring a petroleum stream includes stratifying the petroleum stream into substantially liquid and gas streams. Predetermined parameters of the stratified petroleum stream are sensed and signals are provided accordingly. A sample of the liquid stream of the stratified petroleum stream is taken and parameters of the sample stream are also sensed with representative signals provided by sensors. Circuitry provides signals representative of the water faction, the gas faction, and the oil faction of the petroleum stream in accordance with the signals from all of the sensors.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to apparatus and methods for monitoring petroleum streams in general, and more particularly, for monitoring a crude oil petroleum stream.
2. SUMMARY OF THE INVENTION
Apparatus and method for monitoring a petroleum stream included stratifying the petroleum stream into substantially liquid and gas streams. Predetermined parameters of the stratified petroleum stream are sensed and signals are provided accordingly. A sample of the liquid stream of the stratified petroleum stream is taken and parameters of the sample stream are also sensed with representative signals provided by sensors. Circuitry provides signals representative of the water flow rate, the gas flow rate, and the oil flow rate of the petroleum stream in accordance with the signals from all of the sensors.
The object and advantages of the invention will appear more fully hereinafter, consideration of the detailed description which follows, taken together with the accompanying drawings, wherein one embodiment of the invention is illustrated by way of example. It is to be expressly understood, however, that the drawings are for illustration purposes only and are not to be constued as defining the limits of the invention.
Description of the Drawings
FIG. 1 is a graphical representation of a petroleum stream monitor constructed in accordance with the present invention monitoring a petroleum stream.
FIG. 2 is a simplified block diagram of a petroleum stream monitor constructed in accordance with the present invention.
Description of the Preferred Embodiment
Referring to FIG. 1, the present invention monitors a crude oil production stream which normally includes not only the crude oil but water and gas. The crude oil production stream flows through a separating pipe 17. Pipe 17 is arranged so as to create a suitable angle of inclination to cause the production stream to separate into liquid and gas. A preferred angle of inclination lies within a range of angles between 10° and 60.
The liquid flow in pipe 17 is sampled by an inlet tubing 24 and provided to separator means 28. Separator means 28 separates substantially all gas that has not been separated in separating pipe 17 from the liquid and provides it by a return tubing 34 to separating pipe 17. The liquid may be applied to a mixer pump 40 where it is thoroughly mixed to achieve a homogeneous liquid and provided by another tubing 41 to return tubing 34.
A temperature sensor 42 senses the liquid temperature and provides a corresponding signal E1 to monitor means 44. A pressure sensor 48 senses the pressure and provides a pressure signal E2 to monitor means 44. Gas velocity measuring means 53, measures the velocity of the gas after stratification has taken place in separating pipe 17. Measuring means 53 provides a gas velocity signal E3 to monitor means 44. A liquid flow meter 56 measures the velocity of the liquid portion in separating pipe 17 and provides a corresponding signal E4 to monitor means 44. A conventional type densitometer 60 senses the density of the fluid in pipe 17 and provides a corresponding density signal E5 to monitor means 44. Microwave means 63A and 63B monitors the liquid in tubing 41 and provides signal E6 representative of the water cut of the liquid in line 41 to monitor means 44.
With reference to FIG. 2, the signals E4, E5 provided by liquid flowmeter 56 and densitometer 60, respectively, are provided to liquid flow rate means 70 which provides a signal corresponding to the liquid flow FRL rate using the following equation:
FR.sub.L =(A.sub.L)(V.sub.L),
where AL is the cross-sectional area of the liquid and VL is the velocity of the liquid represented by signal E4.
However, AL is not measured directly but requires the combining of signals E1, E2, E5, and E6 utilizing the following equations
ρ=(A.sub.L /A)ρ.sub.L +(1-A.sub.L /A)ρ.sub.G
which is rewritten as
A.sub.L =(ρ-ρ.sub.G)A/(ρ.sub.L -ρ.sub.G)
where ρ is the average density of the petroleum stream measured by densitometer 60 and is represented by signal E5, ρL is the density of the liquid represented by signal E6 from microwave means 63B and ρG is the density of the gas which the known gas density from well tests corrected for temperature and pressure represented by signals E1 and E2 respectively.
Microwave means 63B provides signal E6 memory means contains lookup tables relating signal E6 amplitude to water cut values. Memory means 74 provides a signal Wc corresponding to the water cut of the liquid portion of the crude oil stream in accordance with signal E6. With signals FRL and Wc, oil flow rate and water flow rate means 77 determines the oil flow rate and the water flow rate and provides signals FRO and FRW, respectively, accordingly. Signal E3 provided by gas velocity measuring means 53 and signal E5 from densitometer 60 are applied to gas flow rate means 80 which provides a signal FRG corresponding to the gas flow rate in accordance with the following equation:
FR.sub.G =(A.sub.G)(V.sub.G),
where AG is the cross-sectional area of the gas represented by signal E5 and VG is the gas velocity represented by signal E3.
Signals FRW and FRO from the oil flow rate and water flow rate means 77 and signal FRG from the gas flow rate means 80 are provided to temperature and pressure correction means 85 receiving temperature signal E1 from temperature sensor 42 and pressure signal E2 from pressure sensor 48. Temperature and pressure correction means 85 adjusts signals FRO, FRW and FRG so as to convert the oil flow rate, the water flow rate and the gas flow rate to standard condition flow rates. Correction means 85 provides standardized flow rate signals for the oil, water and gas to recording and indicating means 90 for their recordation and a corresponding display.
The present invention as hereinbefore described provides an indication and record of the gas flow rate, the oil flow rate and the water flow rates of a multiphase petroleum production stream. It would be obvious to one skilled in the art, that knowing the gas, oil and water flow rates one could also arrive at the volume by percent of these constituents.

Claims (18)

What is claimed is:
1. Apparatus for monitoring a petroleum stream comprising:
means for stratifying the petroleum stream into substantially liquid and gas streams,
first means for sensing the parameters of the stratified petroleum stream and providing signals representative of the sensed parameters,
means for sampling the liquid stream of the stratified petroleum stream to provide a sample stream,
second means for sensing parameters of the sample stream and providing signals in accordance with the sensed parameters, and
monitor means for providing signals representative of the water fraction, the gas fraction and the oil fraction of the petroleum stream in accordance with the signals from all the parameter sensing means.
2. Apparatus as described in claim 1 in which the first sensing means includes:
means for determining the density of the petroleum stream and providing a corresponding signal,
means for sensing the gas velocity of the gas stream of the stratified petroleum stream and providing a signal representative thereof,
means for sensing the liquid velocity of the liquid stream of the stratified petroleum stream and providing a signal in accordance with the sensed liquid velocity, and
means for sensing the pressure of the stratified petroleum stream and providing a signal corresponding to the sensed pressure.
3. Apparatus as described in claim 2 in which the sample means includes separator means for removing gas from the sample stream,
means for returning the removed gas to the stratified petroleum stream, and
means for returning the sample stream from the seperator means to the stratified petroleum stream.
4. Apparatus as described in claim 3 in which the second sensing means includes
microwave means for monitoring the sample stream after it has left the separator means to provide a signal related to the water in the sample stream, and
a sensor which senses the temperature of the sample stream after it leaves the separating means which provides a corresponding temperature signal.
5. Apparatus as described in claim 4 in which the monitor means includes liquid flow rate means connected to the density determining means, to the liquid velocity sensing means, to the pressure sensing means, to the microwave means and to the temperature sensor for providing a signal corresponding to the liquid flow rate in accordance with the signals from the density determining means, the liquid velocity sensing means, the pressure sensing means, the microwave means and the temperature sensor,
memory means connected to the microwave means for providing a signal corresponding to the water content of the petroleum stream in accordance with the signal from the microwave means;
gas flow rate means connected to the density sensing means and to the gas velocity sensing means for providing a signal corresponding to the gas flow rate of the petroleum stream in accordance with the signals from the density sensing means and the gas velocity sensing means; and
oil/water flow means connected to the liquid flow rate means and to the memory means for providing signals corresponding to the water flow rate and to the oil flow rate in accordance with the signals from the liquid flow rate means and the memory means.
6. Apparatus as described in claim 5 in which the monitor means further includes signal processing means connected to the oil/water flow rate means, to the gas flow rate means, to the temperature sensing means, and to the pressure sensing means for providing temperature and pressure corrected signals corresponding to the flow rate of the gas, to the flow rate of the oil, and to the flow rate of the water.
7. Apparatus as described in claim 6 in which the stratifying means is means which cause the petroleum stream to flow at a predetermined angle to the horizontal so as to cause the liquid and gas to separate.
8. Apparatus as described in claim 1 in which the stratifying means is means which cause the petroleum stream to flow at a predetermined angle to the horizontal so as to cause the liquid and gas to separate.
9. Apparatus as described in claim 8 in which a preferred angle for petroleum stream flow lies within a range of angles between 10° and 60°.
10. A method for monitoring a petroleum stream comprising the steps of:
stratifying the petroleum stream into substantially liquid and gas streams,
sensing the parameters of the stratified petroleum stream and providing signals representative of the sensed parameters,
sampling the liquid stream of the stratified petroleum stream to provide a sample stream,
sensing parameters of the sample stream and providing signals in accordance with the sensed parameters, and
providing output signals representative of the water fraction, the gas fraction and the oil fraction of the petroleum stream in accordance with the signals from all the parameter sensing steps.
11. A method as described in claim 10 in which the first mentioned sensing step includes:
determining the density of the petroleum stream and providing a corresponding density signal,
sensing the gas velocity of the gas stream of the stratified petroleum stream and providing a gas velocity signal representative thereof,
sensing the liquid velocity of the liquid stream of the stratified petroleum stream and providing a liquid velocity signal in accordance with the senced liquid velocity, and
sensing the pressure of the stratified petroleum stream and providing a corresponding pressure signal.
12. A method as described in claim 11 in which the sampling step includes:
removing gas from the sample stream,
returning the removed gas to the stratified petroleum stream, and
returning the sample stream after the separator step to the stratified petroleum stream.
13. A method as described in claim 12 in which the sample stream sensing step includes:
monitoring the sample stream after it has left the separator means using microwave devices to provide a water signal related to the water in the sample stream, and
sensing the temperature of the sample stream after it leaves the separating means and providing a corresponding temperature signal.
14. A method as described in claim 13 in which the output signals step includes:
providing a liquid flow signal corresponding to the liquid flow rate in accordance with the density signal, the liquid velocity signal, the pressure signal, the water signal and the temperature signal,
providing a water content signal corresponding to the water content of the petroleum stream in accordance with the water signal,
providing a gas flow rate signal corresponding to the gas flow rate of the petroleum stream in accordance with the density signal and the gas velocity signal, and
providing a water flow rate signal and an oil flow rate signal corresponding to the water flow rate and to the oil flow rate, respectively, in accordance with the liquid flow rate signal and the water content signal.
15. A method as described in claim 14 in which the output signals step further includes providing temperature and pressure corrected signals corresponding to the flow rate of the gas, to the flow rate of the oil, and to the flow rate of the water in accordance with the oil flow rate signal, the water flow rate signal, the gas flow rate signal, the temperature signal and the pressure signal.
16. A method as described in claim 15 in which the stratifying step is accomplished by causing the petroleum stream to flow at a predetermined angle to the horizontal so as to cause the liquid and gas to separate.
17. A method as described in claim 10 in which the stratifying step is accomplished by causing the petroleum stream to flow at a predetermined angle to the horizontal so as to cause the liquid and gas to separate.
18. A method as described in claim 17 in which a preferred angle for stratifying the petroleum stream flow lies within a range of angles between 10° and 60°.
US06/775,073 1985-09-12 1985-09-12 Petroleum stream monitoring means and method Expired - Lifetime US4660414A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US06/775,073 US4660414A (en) 1985-09-12 1985-09-12 Petroleum stream monitoring means and method
DE19863622669 DE3622669A1 (en) 1985-09-12 1986-07-05 OIL FLOW MONITORING DEVICE AND METHOD
GB8619215A GB2180352B (en) 1985-09-12 1986-08-06 Petroleum stream monitoring means
CA000517440A CA1296927C (en) 1985-09-12 1986-09-04 Petroleum stream monitoring means and method
NO863555A NO172611C (en) 1985-09-12 1986-09-05 DEVICE FOR MONITORING A PETROLEUM FLOW
DK435986A DK435986A (en) 1985-09-12 1986-09-11 APPLIANCES FOR CURRENT MEASUREMENT OF OIL PRODUCTS LIKE RAW OIL

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Application Number Priority Date Filing Date Title
US06/775,073 US4660414A (en) 1985-09-12 1985-09-12 Petroleum stream monitoring means and method

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US4660414A true US4660414A (en) 1987-04-28

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CA (1) CA1296927C (en)
DE (1) DE3622669A1 (en)
DK (1) DK435986A (en)
GB (1) GB2180352B (en)
NO (1) NO172611C (en)

Cited By (22)

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US4776210A (en) * 1987-06-03 1988-10-11 Atlantic Richfield Company Multiphase fluid flow measurement systems and methods
US4852395A (en) * 1988-12-08 1989-08-01 Atlantic Richfield Company Three phase fluid flow measuring system
US4872316A (en) * 1988-02-01 1989-10-10 The Charles Stark Draper Laboratory, Inc. System for monitoring a liquid entrained in a fluid
US4881412A (en) * 1985-08-14 1989-11-21 Ronald Northedge Flow meters
US4959965A (en) * 1988-02-01 1990-10-02 The Charles Stark Draper Laboratory, Inc. System for monitoring a liquid entrained in a fluid
US4977915A (en) * 1989-11-08 1990-12-18 Texaco Inc. Demulsifier control system and method
WO1991002948A1 (en) * 1989-08-18 1991-03-07 The Secretary Of State For Trade And Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Combined separator and sampler
WO1991005135A1 (en) * 1989-10-02 1991-04-18 The Secretary Of State For Trade And Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Phase fraction meter
US5101163A (en) * 1989-10-04 1992-03-31 Agar Corporation Ltd. Oil/water measurement
US5524475A (en) * 1994-11-10 1996-06-11 Atlantic Richfield Company Measuring vibration of a fluid stream to determine gas fraction
US5597961A (en) * 1994-06-27 1997-01-28 Texaco, Inc. Two and three phase flow metering with a water cut monitor and an orifice plate
US5660617A (en) * 1996-05-16 1997-08-26 Southwest Research Institute System and method for maintaining multiphase flow with minimal solids degradation
GB2348831A (en) * 1999-04-12 2000-10-18 Shell Int Research Device for separating mixture of non-miscible liquids and gas
US6164308A (en) * 1998-08-28 2000-12-26 Butler; Bryan V. System and method for handling multiphase flow
US6234030B1 (en) 1998-08-28 2001-05-22 Rosewood Equipment Company Multiphase metering method for multiphase flow
US6405603B1 (en) 2001-03-23 2002-06-18 Joseph Baumoel Method for determining relative amounts of constituents in a multiphase flow
WO2003080212A1 (en) * 2002-03-25 2003-10-02 Shell Internationale Research Maatschappij B.V. Method and device for separating a mixture of fluids
US20030226396A1 (en) * 2002-06-10 2003-12-11 Al-Ghamdi Abdulla H. Water cut rate of change analytic method
GB2547407A (en) * 2015-11-24 2017-08-23 Schlumberger Holdings Flow measurement insert
CN110082163A (en) * 2019-05-31 2019-08-02 北京壮大瑞业科技发展有限公司 Oil tank sampling equipment
US10370958B2 (en) * 2014-02-12 2019-08-06 Rockwell Automation Asia Pacific Business Center Pte, Ltd. Systems and methods for locally performing well testing
US10724886B2 (en) 2015-11-24 2020-07-28 Schlumberger Technology Corporation Stratified flow multiphase flowmeter

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US5048348A (en) * 1989-02-14 1991-09-17 Texaco Inc. Fluid flow volumetric determination apparatus and method
DE3931497A1 (en) * 1989-09-21 1991-04-18 Sensoplan Messtechnik Gmbh Arrangement for detecting contaminants in fluid esp. lubricant - converts flow into rotary flow in sensor head for separation by specific wt. and subsequent measurement
US5099697A (en) * 1990-04-02 1992-03-31 Agar Corporation Ltd. Two and three-phase flow measurement
US5127272A (en) * 1991-01-03 1992-07-07 Texaco Ltd. Multiphase flow rate monitoring means and method
US5195380A (en) * 1991-05-17 1993-03-23 Texaco Inc. Petroleum stream analyzing means and method
GB2286463A (en) * 1994-02-14 1995-08-16 Boc Group Plc Fluid flow measurement
EP0859236A1 (en) * 1997-02-14 1998-08-19 Bp Chemicals S.N.C. Determination of properties of oil
DE102021107684A1 (en) 2021-03-26 2022-09-29 Truedyne Sensors AG Method and apparatus for determining a sample stream concentration value of an analyte in a sample stream

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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881412A (en) * 1985-08-14 1989-11-21 Ronald Northedge Flow meters
US4776210A (en) * 1987-06-03 1988-10-11 Atlantic Richfield Company Multiphase fluid flow measurement systems and methods
US4872316A (en) * 1988-02-01 1989-10-10 The Charles Stark Draper Laboratory, Inc. System for monitoring a liquid entrained in a fluid
US4959965A (en) * 1988-02-01 1990-10-02 The Charles Stark Draper Laboratory, Inc. System for monitoring a liquid entrained in a fluid
US4852395A (en) * 1988-12-08 1989-08-01 Atlantic Richfield Company Three phase fluid flow measuring system
WO1991002948A1 (en) * 1989-08-18 1991-03-07 The Secretary Of State For Trade And Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Combined separator and sampler
WO1991005135A1 (en) * 1989-10-02 1991-04-18 The Secretary Of State For Trade And Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Phase fraction meter
US5101163A (en) * 1989-10-04 1992-03-31 Agar Corporation Ltd. Oil/water measurement
US4977915A (en) * 1989-11-08 1990-12-18 Texaco Inc. Demulsifier control system and method
US5597961A (en) * 1994-06-27 1997-01-28 Texaco, Inc. Two and three phase flow metering with a water cut monitor and an orifice plate
US5524475A (en) * 1994-11-10 1996-06-11 Atlantic Richfield Company Measuring vibration of a fluid stream to determine gas fraction
US5660617A (en) * 1996-05-16 1997-08-26 Southwest Research Institute System and method for maintaining multiphase flow with minimal solids degradation
US6234030B1 (en) 1998-08-28 2001-05-22 Rosewood Equipment Company Multiphase metering method for multiphase flow
US6164308A (en) * 1998-08-28 2000-12-26 Butler; Bryan V. System and method for handling multiphase flow
US6354318B2 (en) 1998-08-28 2002-03-12 Rosewood Equipment Company System and method for handling multiphase flow
GB2348831A (en) * 1999-04-12 2000-10-18 Shell Int Research Device for separating mixture of non-miscible liquids and gas
US6468335B1 (en) 1999-04-12 2002-10-22 Shell Oil Company Device for separating a mixture of fluids
GB2348831B (en) * 1999-04-12 2002-11-20 Shell Int Research Device for separating a mixture of fluids
US6405603B1 (en) 2001-03-23 2002-06-18 Joseph Baumoel Method for determining relative amounts of constituents in a multiphase flow
US20050150842A1 (en) * 2002-03-25 2005-07-14 Puik Eric J. Method and device for separating a mixture of fluids
WO2003080212A1 (en) * 2002-03-25 2003-10-02 Shell Internationale Research Maatschappij B.V. Method and device for separating a mixture of fluids
CN1319619C (en) * 2002-03-25 2007-06-06 国际壳牌研究有限公司 Method and device for separating a mixture of fluids
US7364661B2 (en) 2002-03-25 2008-04-29 Shell Oil Company Method and device for separating a mixture of fluids
US20030226396A1 (en) * 2002-06-10 2003-12-11 Al-Ghamdi Abdulla H. Water cut rate of change analytic method
US7059180B2 (en) * 2002-06-10 2006-06-13 Saudi Arabian Oil Company Water cut rate of change analytic method
US10370958B2 (en) * 2014-02-12 2019-08-06 Rockwell Automation Asia Pacific Business Center Pte, Ltd. Systems and methods for locally performing well testing
GB2547407A (en) * 2015-11-24 2017-08-23 Schlumberger Holdings Flow measurement insert
GB2547407B (en) * 2015-11-24 2019-03-27 Schlumberger Holdings Flow measurement insert
US10724886B2 (en) 2015-11-24 2020-07-28 Schlumberger Technology Corporation Stratified flow multiphase flowmeter
US10815773B2 (en) 2015-11-24 2020-10-27 Schlumberger Technology Corporation Flow measurement insert
CN110082163A (en) * 2019-05-31 2019-08-02 北京壮大瑞业科技发展有限公司 Oil tank sampling equipment

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NO172611C (en) 1993-08-11
DK435986A (en) 1987-03-13
DE3622669A1 (en) 1987-03-19
DK435986D0 (en) 1986-09-11
NO172611B (en) 1993-05-03
NO863555D0 (en) 1986-09-05
NO863555L (en) 1987-03-13
GB8619215D0 (en) 1986-09-17
CA1296927C (en) 1992-03-10
GB2180352A (en) 1987-03-25
GB2180352B (en) 1989-09-06

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